Exhaust Gaskets SBM 318-360

The REMFLEX Exhaust Gaskets SBM 318-360 are precision-engineered header gaskets designed specifically for Small Block Mopar engines with rectangular port configurations. Built for mechanics and engine builders who demand reliability during high-temperature exhaust cycles, these graphite gaskets seal the critical interface between your headers and cylinder head. Whether you're running a stock rebuild or a modified 318 or 360 cubic-inch engine, proper exhaust sealing prevents leaks that rob power and create rough idle conditions.

Constructed from graphite material, the REMFLEX gaskets withstand continuous exposure to exhaust heat without degradation or blowout, a critical advantage over traditional composite gaskets that harden and fail over time. The 1.062 x 1.718 inch rectangular port profile matches Stan's Headers and other aftermarket small block Mopar units, ensuring a perfect seal without modification. This pair covers both sides of the engine, and the gasket thickness and dimensional precision allow for repeatable, leak-free installations across multiple engine builds—essential when you're working on vintage Mopars or performance restorations where exhaust integrity directly impacts tuning stability.

Technicians and engine builders commonly choose these gaskets when installing aftermarket headers on 318 or 360 platforms, particularly for Dodge, Plymouth, and Chrysler applications where OEM gaskets are no longer available or have failed. Installation is straightforward: position the gasket on the cylinder head port, align your header flange, and torque fasteners in a cross pattern for even clamping. The graphite composition resists thermal cycling stress, making these gaskets ideal for both street and strip environments where repeated heat cycles would compromise lesser materials.